Can I sell a product that is only to be available as on "Add on"?

Hi, 

I wonder if anyone has insights or suggestions on whether it's possible to have products within a store that are only visible to customers once another specific product is added to their cart.

The idea is to create a scenario where a "hidden" product becomes visible and available as an add-on only when a specific prerequisite product is added to the cart. For instance, once Product A is added, Product B becomes visible and can be selected as an add-on.

Any guidance or thoughts on achieving this would be greatly appreciated.

Thank you in advance for your insights and suggestions.

I second this comment. It would be great to have certain products only available as add-ons once the customer has selected the main product. I don't want customers to add to their cart the "add-on" as it requires the first product to be purchased first. 

The only way I can think of doing it is opening a second shop that is hidden from your main page.